INFLUENCE OF MECHANICAL TREATMENT AND NEGATIVE TEMPERATURE ON THE STRENGTH OF CARBON FIBER REINFORCED PLASTICS UNDER STATIC BENDING

All the Materials. Encyclopedic Reference Book Pub Date : 1900-01-01 DOI:10.31044/1994-6260-2023-0-5-28-34

I. S. Bolotnikov, E. Kosenko, P. E. Demin

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Abstract

The results of tests using the three-point bending method to assess the change in the strength of carbon fiber reinforced plastics produced by the milling method using various cutting conditions are presented. The tests were carried out on samples of three series, each of which was made in two sets. The series of samples differ in the applied cutting conditions (frequency of rotation of a cutter at the same feed), and sets differ in the conditions of exposure before testing: at a positive temperature 20±2 °С and at a negative one –50 °C for 60 hours. It has been established that the cutter rotation frequency has practically no effect on the change in bending strength, however, it significantly affects the value of the maximum deflection and the finish of the cut surface. Reducing the speed of the cutter leads to an increase in temperature in the cutting zone, an improvement in the quality of the cut surface and an increase in maximum deflection. The influence of negative temperature leads to an increase in the maximum deflection and a decrease in the bending strength of carbon fiber reinforced plastics

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机械处理和负温度对碳纤维增强塑料静态弯曲强度的影响

介绍了采用三点弯曲法对不同切削条件下铣削法生产的碳纤维增强塑料的强度变化进行试验的结果。试验对三个系列的样品进行，每个系列分为两组。该系列样品在应用的切削条件(相同进料时刀具的旋转频率)不同，并且在测试前的暴露条件不同:在正温度20±2°С和负温度-50°C下60小时。刀具旋转频率对弯曲强度的变化几乎没有影响，但对最大挠度值和切割表面的光洁度有显著影响。降低刀具的速度导致切削区温度升高，切削表面质量改善，最大挠度增加。负温度的影响导致碳纤维增强塑料的最大挠度增大，抗弯强度降低

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All the Materials. Encyclopedic Reference Book

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